Chip capacitors have a wide range of applications in electronic products, and when choosing chip capacitors, you need to judge according to the parameters in its specification. The following will be from the chip capacitor model, rated voltage, capacity, withstand voltage and package and other aspects of a detailed description.
First, the chip capacitor model
Chip capacitor model is usually composed of numbers and letters, where the number represents the size of the capacitor, the letter represents the capacitor material and type. For example, the common chip capacitor models are 0805, 0603, 0402, etc., of which 0805 indicates that the size of the capacitor is 0.08 inches × 0.05 inches, 0603 indicates that the size of the capacitor is 0.06 inches × 0.03 inches, 0402 indicates that the size of the capacitor is 0.04 inches × 0.02 inches.
Second, the rated voltage of chip capacitors
The rated voltage of chip capacitors is the maximum DC voltage that the capacitor can withstand under the specified temperature and frequency conditions. When selecting chip capacitors, you need to select the appropriate rated voltage according to the operating voltage of the circuit. If the operating voltage of the circuit exceeds the rated voltage of the capacitor, it may cause the capacitor to breakdown or be damaged.
Third, the capacity of chip capacitors
The capacity of chip capacitors refers to the amount of charge that the capacitor can store under the specified temperature and frequency conditions. When choosing chip capacitors, you need to choose the right capacity according to the needs of the circuit. If the circuit requires a larger capacitance capacity, you can choose multiple capacitors in parallel.
Fourth, the chip capacitor voltage
Chip capacitor voltage withstand refers to the specified temperature and frequency conditions, the capacitor can withstand the maximum AC voltage. In the selection of chip capacitors, according to the circuit operating voltage to choose the appropriate withstand voltage. If the operating voltage of the circuit exceeds the capacitor's withstand voltage, it may lead to capacitor breakdown or damage.
Fifth, the chip capacitor package
Chip capacitor package refers to the capacitor's external dimensions and the number and location of pins. Common chip capacitor package SOT23, SOT89, SOT143, etc., of which SOT23 that the capacitor's external dimensions of 2.5mm × 4.9mm, the number of pins for the 3, pin spacing 0.65mm; SOT89 that the capacitor's external dimensions of 3.2mm × 5.6mm, the number of pins for the 3, the pin spacing 0.8mm; SOT143 indicates that the capacitor has an external dimension of 5.0mm × 6.5mm, the number of pins is 3, and the pin pitch is 1.27mm.
When selecting chip capacitors, you need to select the appropriate model and package according to the needs of the circuit and package compatibility. At the same time, it is also necessary to pay attention to the quality and reliability of chip capacitors to avoid circuit failure or damage due to capacitor quality problems.
